Niels Lohmann
Lead, Engineering at MongoDB
Berlin, Germany
Summary
🤩
Rockstar🎓
Top School
Top expert inModern C++ Development and Cross-Platform Computing
Niels Lohmann is a seasoned engineering leader with nearly 20 years of hands-on software development in Modern C++ and Python, now serving as Lead, Engineering at MongoDB from Berlin. He combines deep embedded and automotive experience—10 years in series and pre-development—with 16 years of technical leadership across specification, architecture, QA, and release management. As an Engineering Lead he blends people management with technical ownership, remaining ~66% hands-on to drive complex, memory- and runtime-critical systems. Niels is the long-time maintainer of the widely used nlohmann/json library (39k stars), notable for its single-header portability and rigorous CI that targets 50+ compilers. His background in academic research and production-grade tooling informs a pragmatic approach to correctness: 100% unit coverage, fuzzing, and static analysis are standard practices in his projects. Colleagues describe him as a sustainable leader who favors mentorship, change management, and building efficient, satisfied teams.
20 years of coding experience
18 years of employment as a software developer
Diplom-Informatiker Computer Science, Diplom-Informatiker Computer Science at Humboldt-Universität zu BerlinDoktor-Ingeneur (PhD) Computer Science, Doktor-Ingeneur (PhD) Computer Science at Universität Rostock
English, German
Stackoverflow
2,134reputation
228kreached
19answers
10questions
json
top-5%
Github Skills (15)
maintenance10
c-language10
cprogramming-language10
software-quality10
code-cleanup10
json9
nlohmann-json6
autoconf6
macos6
stl6
ant6
android6
linphone6
automake6
autotools6
Programming languages (19)
Github contributions (5)
nlohmann/json
Jul 2013 - Dec 2022
JSON for Modern C++
Role in this project:
Back-end Developer
Back-end DeveloperContributions:41 releases, 870 reviews, 3483 commits in 9 years 7 months
Contributions summary:Niels's contributions primarily focus on fixing linter warnings and setting the version. The majority of the commits are related to code style improvements and ensuring code quality. The commits suggest a focus on maintaining and updating the codebase.
clangc-plus-plusmessagepackrfc-7159json-patch
oficsu/json
Nov 2019 - Jul 2020
JSON for Modern C++
Contributions:12 commits in 8 months
cppc-plus-plusmodern-ccpp17json
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